By the end of this chapter you'll be able to…

  • 1Write money amounts in ₹ and paise notation: ₹45.75 means 45 rupees and 75 paise
  • 2Convert rupees to paise: ₹1 = 100 paise; ₹5 = 500 paise
  • 3Convert paise to rupees: 250 paise = ₹2.50; 1075 paise = ₹10.75
  • 4Add and subtract money amounts with paise (e.g., ₹35.50 + ₹12.75 = ₹48.25)
  • 5Solve shopping problems: find total bill, calculate change from ₹50, ₹100, ₹500
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Why this chapter matters
Class 3 Money moves from simple rupee addition to rupee-and-paise calculations, unit conversion (₹1 = 100 paise), and multi-item shopping problems. Children learn to write amounts in the ₹X.YY format, add and subtract money across rupees and paise, calculate total bills, and determine change. This is real financial literacy — the same skills adults use every time they shop, check a bill, or count change.

Before you start — revise these

A 5-minute refresher here will save you 30 minutes of confusion below.

Money — Class 3 Mathematics (Samacheer Kalvi)

TN State Board (Samacheer Kalvi) Class 3 Mathematics, Chapter 5. Rupees, paise and money problems.


1. About this chapter

This chapter covers Money as part of the Class 3 Samacheer Kalvi Mathematics curriculum. It deals with rupees, paise and money problems and builds conceptual understanding essential for the TN School Term Exam.

By the end of this chapter, students will be able to:

  • Read and write amounts in rupees and paise
  • Solve simple money word problems

2. Key concepts

  • Concept 1: Read and write amounts in rupees and paise.
  • Concept 2: Solve simple money word problems.

3. Important terms and formulas

Term / FormulaDescription
Read and write amounts…Read and write amounts in rupees and paise
Solve simple money word…Solve simple money word problems

4. Worked examples

Example 1. Applying a key concept from this chapter.

Solution: Identify the relevant principle → apply the formula or rule → state the answer with correct units.

Example 2. A typical exam-style question on money.

Solution: Break the problem into steps, use the appropriate formula and verify the answer.

5. Common mistakes

  • Mistake: Skipping units or forgetting to state them. Fix: Always write units alongside every quantity and answer.
  • Mistake: Confusing similar terms or concepts in this chapter. Fix: Make a comparison table of the terms during revision.

6. Practice (exam-style)

  1. Define the main term or principle covered in Chapter 5.
  2. Give two real-life examples related to money.
  3. Solve a short numerical or descriptive question from this chapter.
  4. State one important formula and explain each symbol.

7. Answer key (hints)

  1. Refer to section 2 (Key concepts) above for the definition.
  2. Examples should be drawn from daily experience and local context.
  3. Apply the formula from section 3, show all steps clearly.
  4. Formula with units — refer to the textbook glossary for symbol meanings.

8. Quick revision

  • Class 3 Mathematics — Chapter 5: Money.
  • Core idea: Rupees, paise and money problems.
  • Key outcomes: Read and write amounts in rupees and paise; Solve simple money word problems.
  • Always revise diagrams / tables from the Samacheer Kalvi textbook before the exam.

Key formulas & results

Everything you need to memorise, in one card. Screenshot this for revision.

Rupee-Paise conversion
₹1 = 100 paise. To convert rupees to paise: multiply by 100. ₹3.50 = 3.50 × 100 = 350 paise. To convert paise to rupees: divide by 100. 475 paise = ₹4.75.
The ₹ symbol always goes before the number. The paise part comes after the decimal point: ₹12.50, NOT ₹12.5 or 12₹.50.
Adding and subtracting money
Arrange rupees and paise in columns. Add/subtract paise first (2-digit max). If paise ≥ 100, convert 100 paise = ₹1 and carry over. Example: ₹25.75 + ₹18.50 = ₹44.25.
Think of paise like 'cents' in a ₹100 system. ₹1 = 100 paise makes calculations easy — just align the decimal points and calculate normally.
Calculating change
Change = Amount paid − Total bill. Example: Bill = ₹67.50, paid with ₹100 note. Change = 100.00 − 67.50 = ₹32.50.
Always check your change before leaving the counter. Count it back to verify: '₹67.50 plus ₹2.50 makes ₹70, plus ₹30 makes ₹100.'
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Common mistakes & fixes

These are the exact errors that cost students marks in board exams. Read them once, save yourself the trouble.

WATCH OUT
Writing 50 paise as ₹0.5 instead of ₹0.50
Paise is always written with 2 digits after the decimal: 50 paise = ₹0.50, 5 paise = ₹0.05. ₹0.5 could be misread as 5 paise. Always use two decimal places.
WATCH OUT
Adding ₹25.75 + 18.50 as 25 + 75 + 18 + 50 = 168 (completely wrong)
The numbers before the decimal are rupees; after the decimal are paise. Add rupees to rupees, paise to paise: 25+18 = ₹43. 75+50 = 125 paise = ₹1.25. Total = ₹43 + ₹1.25 = ₹44.25.
Verified by the tuition.in editorial team
Last reviewed on 3 June 2026. Written and reviewed by subject-matter experts — read about our process.
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